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/*
* Copyright (C) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "CalleeBits.h"
#include "ImplementationVisibility.h"
#include <wtf/TZoneMalloc.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/ThreadSafeWeakPtr.h>
namespace JSC {
class LLIntOffsetsExtractor;
class NativeCallee : public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<NativeCallee> {
WTF_MAKE_COMPACT_TZONE_ALLOCATED(NativeCallee);
public:
enum class Category : uint8_t {
InlineCache,
Wasm,
};
Category category() const { return m_category; }
ImplementationVisibility implementationVisibility() const { return m_implementationVisibility; }
void dump(PrintStream&) const;
JS_EXPORT_PRIVATE void operator delete(NativeCallee*, std::destroying_delete_t);
protected:
JS_EXPORT_PRIVATE NativeCallee(Category, ImplementationVisibility);
private:
Category m_category;
ImplementationVisibility m_implementationVisibility { ImplementationVisibility::Public };
};
// This lets you do a RefPtr<NativeCallee, BoxedNativeCalleePtrTraits<NativeCallee>>
template<typename T>
class BoxedNativeCalleePtrTraits {
public:
using StorageType = CalleeBits;
// Use an intermediate cast to uintptr_t to silence unsafe casting warning. It's locally "obvious" (other than the fact that RefPtr uses StorageType's constructor instead of a wrap) the
// return value is of type T.
static T* unwrap(const CalleeBits& calleeBits) { return reinterpret_cast<T*>(reinterpret_cast<uintptr_t>(calleeBits.asNativeCallee())); }
static T* exchange(CalleeBits& calleeBits, T* newCallee)
{
T* result = unwrap(calleeBits);
calleeBits = newCallee;
return result;
}
// FIXME: This isn't hashable since we don't have hashTableDeletedValue() or isHashTableDeletedValue()
// but those probably shouldn't be hard to add if needed.
};
} // namespace JSC
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